Author: mav
Date: Fri Jan 11 16:10:11 2013
New Revision: 245306
URL: http://svnweb.freebsd.org/changeset/base/245306
Log:
Do not schedule periph for payload/TUR requests if reprobe is in progress
to avoid sending extra READ CAPACITY requests by dastart(). Schedule periph
again on reprobe completion, or otherwise it may stuck indefinitely long.
This should fix USB explore thread hanging on device unplug, waiting for
periph destruction.
Reported by: hselasky
Modified:
head/sys/cam/scsi/scsi_da.c
Modified: head/sys/cam/scsi/scsi_da.c
==============================================================================
--- head/sys/cam/scsi/scsi_da.c Fri Jan 11 15:50:01 2013 (r245305)
+++ head/sys/cam/scsi/scsi_da.c Fri Jan 11 16:10:11 2013 (r245306)
@@ -1081,6 +1081,9 @@ daschedule(struct cam_periph *periph)
struct da_softc *softc = (struct da_softc *)periph->softc;
uint32_t prio;
+ if (softc->state != DA_STATE_NORMAL)
+ return;
+
/* Check if cam_periph_getccb() was called. */
prio = periph->immediate_priority;
@@ -1425,10 +1428,10 @@ daasync(void *callback_arg, u_int32_t co
}
case AC_SCSI_AEN:
softc = (struct da_softc *)periph->softc;
- if (softc->state == DA_STATE_NORMAL && !softc->tur) {
+ if (!softc->tur) {
if (cam_periph_acquire(periph) == CAM_REQ_CMP) {
softc->tur = 1;
- xpt_schedule(periph, CAM_PRIORITY_DEV);
+ daschedule(periph);
}
}
/* FALLTHROUGH */
@@ -2168,6 +2171,7 @@ dadone(struct cam_periph *periph, union
struct da_softc *softc;
struct ccb_scsiio *csio;
u_int32_t priority;
+ da_ccb_state state;
softc = (struct da_softc *)periph->softc;
priority = done_ccb->ccb_h.pinfo.priority;
@@ -2175,7 +2179,8 @@ dadone(struct cam_periph *periph, union
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("dadone\n"));
csio = &done_ccb->csio;
- switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
+ state = csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK;
+ switch (state) {
case DA_CCB_BUFFER_IO:
case DA_CCB_DELETE:
{
@@ -2273,8 +2278,7 @@ dadone(struct cam_periph *periph, union
softc->outstanding_cmds);
}
- if ((csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) ==
- DA_CCB_DELETE) {
+ if (state == DA_CCB_DELETE) {
while ((bp1 = bioq_takefirst(&softc->delete_run_queue))
!= NULL) {
bp1->bio_resid = bp->bio_resid;
@@ -2300,7 +2304,7 @@ dadone(struct cam_periph *periph, union
rdcap = NULL;
rcaplong = NULL;
- if (softc->state == DA_STATE_PROBE)
+ if (state == DA_CCB_PROBE)
rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
else
rcaplong = (struct scsi_read_capacity_data_long *)
@@ -2313,7 +2317,7 @@ dadone(struct cam_periph *periph, union
u_int lbppbe; /* LB per physical block exponent. */
u_int lalba; /* Lowest aligned LBA. */
- if (softc->state == DA_STATE_PROBE) {
+ if (state == DA_CCB_PROBE) {
block_size = scsi_4btoul(rdcap->length);
maxsector = scsi_4btoul(rdcap->addr);
lbppbe = 0;
@@ -2426,7 +2430,7 @@ dadone(struct cam_periph *periph, union
* If we tried READ CAPACITY(16) and failed,
* fallback to READ CAPACITY(10).
*/
- if ((softc->state == DA_STATE_PROBE2) &&
+ if ((state == DA_CCB_PROBE2) &&
(softc->flags & DA_FLAG_CAN_RC16) &&
(((csio->ccb_h.status & CAM_STATUS_MASK) ==
CAM_REQ_INVALID) ||
@@ -2506,7 +2510,8 @@ dadone(struct cam_periph *periph, union
* operation.
*/
xpt_release_ccb(done_ccb);
- softc->state = DA_STATE_NORMAL;
+ softc->state = DA_STATE_NORMAL;
+ daschedule(periph);
wakeup(&softc->disk->d_mediasize);
if ((softc->flags & DA_FLAG_PROBED) == 0) {
softc->flags |= DA_FLAG_PROBED;
@@ -2631,7 +2636,7 @@ damediapoll(void *arg)
struct cam_periph *periph = arg;
struct da_softc *softc = periph->softc;
- if (softc->state == DA_STATE_NORMAL && !softc->tur) {
+ if (!softc->tur && softc->outstanding_cmds == 0) {
if (cam_periph_acquire(periph) == CAM_REQ_CMP) {
softc->tur = 1;
daschedule(periph);
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
